The Martian (2015) Timeline Explained – Every Event in Order

Commander Lewis made the difficult decision to evacuate because the storm posed an immediate life-threatening risk to the entire crew. Watney was struck by a loose satellite dish during the chaos and became separated from the team. With visibility near zero and the storm intensifying rapidly, Lewis believed Watney was dead and could not risk delaying the evacuation any longer. She led the remaining crew to the Mars Ascent Vehicle (MAV) to escape the deadly conditions.

• commander lewis
• storm evacuation
• mars
• ares iii
• decision

Watney survived by using his expertise as a botanist to create a sustainable food source. He converted the HAB's hallway into a potato farm, using Martian soil mixed with crew members' fecal matter as compost for nutrients. This creative solution allowed him to grow enough potatoes to theoretically survive for years until a rescue could be mounted.

• watney survival
• potatoes
• mars farming
• botanist
• food supply

NASA discovered Watney was alive through satellite imagery analysis. After the agency held a memorial service for Watney, Mindy Park was reviewing recent photos from the Ares III landing site and noticed what appeared to be movement or signs of activity. This prompted NASA to take a closer look, confirming that Watney had survived and was actively maintaining the HAB.

• mindy park
• nasa
• satellite images
• watney alive
• discovery

Watney reactivated a dormant NASA probe called Pathfinder that had been on Mars for years. He rigged the probe's camera to send messages by arranging rocks in specific patterns that corresponded to letters. NASA decoded these messages and established a two-way communication system, allowing Watney to receive instructions and coordinate his rescue.

• pathfinder probe
• communication
• nasa
• mars
• watney contact

The Hermes crew chose to return because they felt personally responsible for leaving Watney behind. Upon learning he was alive, they were overwhelmed with guilt and refused to continue their mission to Earth knowing their friend was stranded. They deliberately disobeyed NASA's orders and took control of the spacecraft to turn their mission into a rescue effort.

• hermes crew
• rescue mission
• return to mars
• loyalty
• guilt

When the HAB's airlock exploded due to a faulty valve, the explosive decompression destroyed much of Watney's potato harvest. The temperature inside the HAB dropped drastically and the remaining potato plants died. This disaster set back his survival timeline significantly, leaving him with far fewer resources than he had planned for.

• airlock
• potato crop
• explosion
• hab
• watney resources

The Chinese Space Agency offered to share their satellite capabilities and resources to help NASA communicate with and eventually resupply Watney. This international collaboration enabled Rich Purnell, a NASA astrodynamicist, to develop an alternative rescue trajectory that NASA could not have achieved alone.

• china space agency
• international collaboration
• rich purnell
• rescue plan

The Rich Purnell maneuver was a complex orbital slingshot plan that allowed the Hermes crew to return to Mars and rescue Watney using minimal fuel. The plan involved the crew performing a gravity assist maneuver around Earth while still in space, essentially using the planet's gravitational pull to change their trajectory without using excessive propellant.

• rich purnell
• orbital maneuver
• gravity assist
• hermes
• rescue trajectory

Watney needed to create fertile soil because Martian dirt contains no nutrients necessary for plant growth. He used the crew's fecal matter (after composting it with their leftover food waste) to introduce essential nitrogen and other nutrients into the Martian soil. This organic fertilizer was the only option available to him on a planet with no other organic material.

• fecal matter
• compost
• potatoes
• nutrients
• martian soil

NASA initially decided not to inform the Hermes crew about Watney's survival because the crew was already on a return trajectory toward Earth. NASA believed adding this knowledge would only cause emotional distress and potentially compromise the crew's judgment during their long journey home. The crew ultimately learned the truth from their flight director while still in space.

• nasa
• hermes crew
• communication
• delayed news
• emotional distress

The Ares IV MAV (Mars Ascent Vehicle) was a spacecraft pre-positioned on Mars for a future mission. Watney needed to travel to its location because it was his only potential way off Mars. The rescue plan required him to reach the MAV and launch himself into orbit where the Hermes crew could intercept and pick him up.

• ares iv
• mav
• mars ascent vehicle
• launch
• rescue plan

Commander Lewis aborted the Ares III mission because an extremely powerful dust storm approached the landing site with winds strong enough to tip over the Hermes spacecraft and destroy the crew's equipment. The storm posed an immediate threat to the astronauts' lives, forcing an emergency evacuation before they could complete their scientific objectives.

• ares iii
• mission abort
• storm
• mars evacuation
• emergency

After returning to Earth following his rescue, Watney became an instructor for new astronauts. He used his firsthand experience surviving on Mars to teach problem-solving and resilience. His unique perspective from nearly a year alone on Mars made him an invaluable teacher for future space exploration missions.

• watney instructor
• earth return
• astronaut training
• future missions

The Hermes crew experienced intense guilt upon learning Watney survived. They felt responsible for his plight because they had left him behind believing he was dead. The revelation that NASA had known about his survival for some time before telling them added to their distress and motivated their decision to disobey orders and return for him.

• hermes crew guilt
• emotional response
• survival
• regret
• team dynamics